The Editor of Market Buzz,a Business Magazine,wants to Make Several

The editor of Market Buzz,a business magazine,wants to make several major changes in the magazine's content and format.Therefore,he asks a few members of the Editorial Board to use diagnostic research to predict the results if the changes are implemented.Given this information,the Editorial Board of Market Buzz will:

A) explain how the magazine's competitors improve their circulation​
B) determine the impact of the changes on the magazine's circulation
C) determine the impact of the changes on the magazine's circulation.​
D) collect information about the magazine's past performance in the market​